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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>mkgroup</title><link rel="stylesheet" type="text/css" href="docbook.css"><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"><link rel="home" href="cygwin-ug-net.html" title="Cygwin User's Guide"><link rel="up" href="using-utils.html" title="Cygwin Utilities"><link rel="prev" href="minidumper.html" title="minidumper"><link rel="next" href="mkpasswd.html" title="mkpasswd"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">mkgroup</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="minidumper.html">Prev</a> </td><th width="60%" align="center">Cygwin Utilities</th><td width="20%" align="right"> <a accesskey="n" href="mkpasswd.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="mkgroup"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>mkgroup — Write /etc/group-like output to stdout</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">mkgroup</code> [
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-l | -L
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[<em class="replaceable"><code>MACHINE</code></em>]
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] [-d [<em class="replaceable"><code>DOMAIN</code></em>]] [-c] [-S <em class="replaceable"><code>CHAR</code></em>] [-o <em class="replaceable"><code>OFFSET</code></em>] [-g <em class="replaceable"><code>GROUPNAME</code></em>] [-b] [-U <em class="replaceable"><code>GROUPLIST</code></em>]</p></div><div class="cmdsynopsis"><p><code class="command">mkgroup</code> -h | -V </p></div></div><div class="refsect1"><a name="mkgroup-options"></a><h2>Options</h2><pre class="screen">
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-l,--local [machine] Print local group accounts of \"machine\",
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from local machine if no machine specified.
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Automatically adding machine prefix for local
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machine depends on settings in /etc/nsswitch.conf.
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-L,--Local [machine] Ditto, but generate groupname with machine prefix.
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-d,--domain [domain] Print domain groups,
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from current domain if no domain specified.
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-c,--current Print current group.
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-S,--separator char For -L use character char as domain\\group
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separator in groupname instead of default '+'.
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-o,--id-offset offset Change the default offset (0x10000) added to gids
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-g,--group groupname Only return information for the specified group.
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One of -l, -d must be specified, too.
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-b,--no-builtin Don't print BUILTIN groups.
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-U,--unix grouplist Print UNIX groups when using -l on a UNIX Samba
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server. Grouplist is a comma-separated list of
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groupnames or gid ranges (root,-25,50-100).
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Enumerating large ranges can take a long time!
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-h,--help Print this message.
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-v,--version Print version information and exit.
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Default is to print local groups on stand-alone machines, plus domain
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groups on domain controllers and domain member machines.
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</pre></div><div class="refsect1"><a name="mkgroup-desc"></a><h2>Description</h2><p>Don't use this command to generate a local /etc/group file, unless you
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really need one. See the Cygwin User's Guide for more information.
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</p><p>The <span class="command"><strong>mkgroup</strong></span> program can be used to create a local
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<code class="filename">/etc/group</code> file. Cygwin doesn't need this file,
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because it reads group information from the Windows account databases,
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but you can add an <code class="filename">/etc/group</code> file for instance, if
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your machine is often disconnected from its domain controller.
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</p><p>Note that this information is static, in contrast to the information
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automatically gathered by Cygwin from the Windows account databases. If
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you change the group information on your system, you'll need to regenerate
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the group file for it to have the new information.</p><p>By default, the information generated by <span class="command"><strong>mkgroup</strong></span>
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is equivalent to the information generated by Cygwin itself. The
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<code class="literal">-d</code> and <code class="literal">-l/-L</code> options allow you to
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specify where the information comes from, some domain, or the local SAM
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of a machine. Note that you can only enumerate accounts from trusted
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domains. Any non-trusted domain will be ignored. Access-restrictions
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of your current account apply. The <code class="literal">-l/-L</code> when used
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with a machine name, tries to contact that machine to enumerate local
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groups of other machines, typically outside of domains. This scenario
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cannot be covered by Cygwin's account automatism. If you want to use
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the <code class="literal">-L</code> option, but you don't like the default
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domain/group separator from <code class="filename">/etc/nsswitch.conf</code>,
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you can specify another separator using the <code class="literal">-S</code> option,
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for instance:</p><div class="example"><a name="utils-mkgroup-ex"></a><p class="title"><b>Example 3.7. Setting up group entry for current user with different
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domain/group separator</b></p><div class="example-contents"><pre class="screen">
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<code class="prompt">$</code> <strong class="userinput"><code>mkgroup -L server1 -S= > /etc/group</code></strong>
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</pre></div></div><br class="example-break"><p>For very simple needs, an entry for the current user's group can be
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created by using the option <code class="literal">-c</code>.</p><p>The <code class="literal">-o</code> option allows for (unlikely) special cases
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with multiple machines where the GIDs might match otherwise. The
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<code class="literal">-g</code> option only prints the information for one group.
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The <code class="literal">-U</code> option allows you to enumerate the standard
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UNIX groups on a Samba machine. It's used together with <code class="literal">-l
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samba-server</code> or <code class="literal">-L samba-server</code>. The normal
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UNIX groups are usually not enumerated, but they can show up as a group
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in <span class="command"><strong>ls -l</strong></span> output. </p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="minidumper.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="using-utils.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="mkpasswd.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">minidumper </td><td width="20%" align="center"><a accesskey="h" href="cygwin-ug-net.html">Home</a></td><td width="40%" align="right" valign="top"> mkpasswd</td></tr></table></div></body></html>
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